Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Que tipo de evento teve BODY CMAS em 1980 e hóquei subaquático?
 ###Tabelas: CREATE TABLE list_of_hat-tricks (list_of_hat-tricks_id AUTO_INCREMENT PRIMARY KEY, No. INT, Season INT, Bowler VARCHAR, Batsmen VARCHAR, For VARCHAR, Against VARCHAR, Ground VARCHAR, Scorecard VARCHAR) CREATE TABLE world_championships_and_world_cups (world_championships_and_world_cups_id AUTO_INCREMENT PRIMARY KEY, Sport VARCHAR, Body VARCHAR, Year VARCHAR, Event type VARCHAR, Location VARCHAR, Nations VARCHAR) CREATE TABLE leadership_classification (leadership_classification_id AUTO_INCREMENT PRIMARY KEY, Stage INT, Winner VARCHAR, General classification VARCHAR, Mountains Classification VARCHAR, Points classification VARCHAR, Sprints Classification VARCHAR, Team Classification VARCHAR) CREATE TABLE list_of_african_countries_by_gdp_per_capita (list_of_african_countries_by_gdp_per_capita_id AUTO_INCREMENT PRIMARY KEY, GDP (PPP) per capita 2010; African/World rank 2010; VARCHAR, Nation VARCHAR, GDP by agriculture 2010 VARCHAR, GDP by industry 2010 VARCHAR, GDP by services 2010 VARCHAR, Total GDP (PPP) 2010; African/World rank 2010; VARCHAR, GDP real growth rate 2010 VARCHAR) CREATE TABLE group_a (group_a_id AUTO_INCREMENT PRIMARY KEY, Home team VARCHAR, Home team score VARCHAR, Away team VARCHAR, Away team score VARCHAR, Ground VARCHAR, Crowd INT, Date VARCHAR)  
SELECT Event type FROM world_championships_and_world_cups WHERE Body = cmas AND Year = 1980 AND Sport = underwater hockey